1 | /* |
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2 | |
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3 | Brian Curless |
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4 | |
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5 | Computer Graphics Laboratory |
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6 | Stanford University |
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7 | |
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8 | --------------------------------------------------------------------- |
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9 | |
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10 | Copyright (1997) The Board of Trustees of the Leland Stanford Junior |
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11 | University. Except for commercial resale, lease, license or other |
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12 | commercial transactions, permission is hereby given to use, copy, |
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13 | modify this software for academic purposes only. No part of this |
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14 | software or any derivatives thereof may be used in the production of |
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15 | computer models for resale or for use in a commercial |
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16 | product. STANFORD MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND |
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17 | CONCERNING THIS SOFTWARE. No support is implied or provided. |
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18 | |
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19 | */ |
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20 | |
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21 | |
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22 | #ifndef _OCC_GRID_RLE_ |
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23 | #define _OCC_GRID_RLE_ |
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24 | |
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25 | #include "vrip.h" |
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26 | #include "ChunkAllocator.h" |
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27 | #include <limits.h> |
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28 | #include "OccGrid.h" |
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29 | |
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30 | typedef ushort RunLength; |
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31 | |
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32 | |
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33 | class OccScanlineRLE { |
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34 | |
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35 | public: |
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36 | |
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37 | RunLength *allocatedLengths; |
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38 | OccElement *allocatedElements; |
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39 | RunLength *lengths; |
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40 | OccElement *elements; |
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41 | RunLength *currentLength; |
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42 | OccElement *currentElem; |
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43 | |
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44 | OccScanlineRLE(); |
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45 | OccScanlineRLE(int dim); |
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46 | ~OccScanlineRLE(); |
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47 | |
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48 | void reset(); |
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49 | OccElement *getNextElement(); |
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50 | RunLength getNextLength(); |
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51 | void putNextElement(OccElement *element); |
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52 | void putNextLength(RunLength length); |
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53 | }; |
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54 | |
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55 | |
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56 | |
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57 | class OccGridRLE { |
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58 | |
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59 | public: |
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60 | enum {CONSTANT_DATA, VARYING_DATA, END_OF_RUN=USHRT_MAX}; |
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61 | enum {FALSE_DATA_BIT=0x8000}; |
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62 | static const ushort HIGHEST_BIT = 0x8000; |
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63 | |
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64 | int xdim, ydim, zdim; |
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65 | float resolution; |
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66 | vec3f origin; |
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67 | vec3f *sliceOrigins; |
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68 | int axis; |
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69 | int flip; |
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70 | |
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71 | RunLength **lengthAddr; |
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72 | ChunkAllocator *lengthChunker; |
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73 | RunLength *currentLength; |
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74 | |
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75 | OccElement **elementAddr; |
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76 | ChunkAllocator *elementChunker; |
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77 | OccElement *currentElem; |
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78 | |
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79 | OccScanlineRLE *rleScanline; |
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80 | OccElement *slice; |
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81 | OccElement *otherSlice; |
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82 | OccElement *scanline; |
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83 | OccElement *defaultElement; |
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84 | int transpXZbytesPerScanline; |
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85 | uchar *transpXZslice; |
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86 | |
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87 | OccElement emptyNoWeight; |
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88 | OccElement fullNoWeight; |
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89 | |
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90 | OccGridRLE(); |
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91 | OccGridRLE(int,int,int,int); |
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92 | |
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93 | void init(int,int,int,int); |
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94 | void freeSpace(); |
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95 | |
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96 | void copy(OccGridRLE *other); |
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97 | void copyParams(OccGridRLE *other); |
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98 | |
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99 | int transposeXZ(OccGridRLE *other); |
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100 | int transposeXY(OccGridRLE *other); |
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101 | int transposeYZ(OccGridRLE *other); |
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102 | |
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103 | void clear(); |
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104 | void reset(); |
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105 | |
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106 | OccElement voxRead (int x, int y, int z); |
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107 | void voxWrite(int x, int y, int z, OccElement &el); |
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108 | |
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109 | OccGrid *voxExpand(); |
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110 | void voxRLE(OccGrid *og); |
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111 | |
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112 | OccElement *getSlice(const char *axis, int sliceNum, int *pxdim, int *pydim); |
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113 | OccElement *getScanline(int y, int z); |
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114 | void putScanline(OccElement *line, int y, int z); |
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115 | void copyScanline(OccScanlineRLE *rleScanline, int y, int z); |
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116 | OccElement *transposeSlice(int xdim,int ydim); |
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117 | OccElement *getElement(int xx, int yy, int zz); |
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118 | void runStats(int yy, int zz, int *numRuns, int *numElems); |
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119 | int getRunType(RunLength *length); |
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120 | void setRunType(RunLength *length, int runType); |
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121 | void putNextElement(OccElement *element); |
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122 | void putNextLength(RunLength length); |
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123 | OccElement *getNextElement(); |
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124 | RunLength getNextLength(); |
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125 | void allocNewRun(int y, int z); |
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126 | void setScanline(int y, int z); |
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127 | int writeDen(const char *); |
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128 | int write(const char *); |
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129 | int read(const char *); |
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130 | int decideType(OccElement *); |
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131 | OccScanlineRLE *getRLEScanline(int yy, int zz); |
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132 | ~OccGridRLE(); |
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133 | }; |
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134 | |
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135 | |
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136 | inline void |
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137 | OccScanlineRLE::reset() |
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138 | { |
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139 | currentElem = elements; |
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140 | currentLength = lengths; |
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141 | } |
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142 | |
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143 | inline OccElement * |
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144 | OccScanlineRLE::getNextElement() |
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145 | { |
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146 | return currentElem++; |
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147 | } |
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148 | |
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149 | |
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150 | inline RunLength |
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151 | OccScanlineRLE::getNextLength() |
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152 | { |
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153 | return *currentLength++; |
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154 | } |
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155 | |
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156 | |
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157 | inline void |
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158 | OccScanlineRLE::putNextElement(OccElement *element) |
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159 | { |
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160 | currentElem->value = element->value; |
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161 | currentElem->totalWeight = element->totalWeight; |
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162 | currentElem++; |
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163 | } |
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164 | |
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165 | |
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166 | inline void |
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167 | OccScanlineRLE::putNextLength(RunLength length) |
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168 | { |
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169 | *currentLength = length; |
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170 | currentLength++; |
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171 | } |
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172 | |
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173 | |
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174 | /* |
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175 | void |
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176 | OccScanlineRLE::copyScanline(OccScanlineRLE *rleScanline) |
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177 | { |
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178 | int i; |
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179 | RunLength length; |
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180 | int runType; |
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181 | OccElement *element; |
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182 | |
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183 | this->reset(); |
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184 | rleScanline->reset(); |
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185 | |
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186 | while (TRUE) { |
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187 | length = rleScanline->getNextLength(); |
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188 | this->putNextLength(length); |
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189 | |
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190 | runType = getRunType(&length); |
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191 | |
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192 | if (runType == OccGridRLE::END_OF_RUN) |
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193 | break; |
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194 | |
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195 | if (runType == OccGridRLE::CONSTANT_DATA) { |
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196 | element = rleScanline->getNextElement(); |
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197 | this->putNextElement(element); |
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198 | } |
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199 | else { |
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200 | for (i=0; i<length; i++) { |
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201 | element = rleScanline->getNextElement(); |
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202 | this->putNextElement(element); |
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203 | } |
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204 | } |
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205 | } |
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206 | } |
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207 | */ |
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208 | |
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209 | inline void |
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210 | OccGridRLE::putNextElement(OccElement *element) |
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211 | { |
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212 | OccElement *newElem = |
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213 | (OccElement *)this->elementChunker->alloc(sizeof(OccElement)); |
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214 | newElem->value = element->value; |
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215 | newElem->totalWeight = element->totalWeight; |
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216 | } |
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217 | |
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218 | |
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219 | inline void |
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220 | OccGridRLE::putNextLength(RunLength length) |
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221 | { |
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222 | RunLength *newLength = |
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223 | (RunLength *)this->lengthChunker->alloc(sizeof(RunLength)); |
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224 | *newLength = length; |
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225 | } |
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226 | |
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227 | |
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228 | inline OccElement * |
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229 | OccGridRLE::getNextElement() |
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230 | { |
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231 | return currentElem++; |
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232 | } |
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233 | |
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234 | inline RunLength |
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235 | OccGridRLE::getNextLength() |
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236 | { |
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237 | return *currentLength++; |
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238 | } |
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239 | |
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240 | |
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241 | inline int |
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242 | OccGridRLE::getRunType(RunLength *length) |
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243 | { |
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244 | int flag; |
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245 | |
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246 | |
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247 | if (*length == OccGridRLE::END_OF_RUN) |
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248 | return OccGridRLE::END_OF_RUN; |
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249 | |
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250 | flag = *length & OccGridRLE::HIGHEST_BIT; |
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251 | *length = *length & ~OccGridRLE::HIGHEST_BIT; |
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252 | if (flag) { |
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253 | return OccGridRLE::VARYING_DATA; |
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254 | } else { |
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255 | return OccGridRLE::CONSTANT_DATA; |
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256 | } |
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257 | } |
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258 | |
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259 | |
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260 | inline void |
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261 | OccGridRLE::setRunType(RunLength *length, int runType) |
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262 | { |
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263 | if (runType == OccGridRLE::END_OF_RUN) |
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264 | *length = OccGridRLE::END_OF_RUN; |
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265 | else if (runType == OccGridRLE::VARYING_DATA) |
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266 | *length = *length | OccGridRLE::HIGHEST_BIT; |
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267 | |
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268 | // else leave it alone |
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269 | } |
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270 | |
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271 | |
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272 | inline int |
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273 | OccGridRLE::decideType(OccElement *element) |
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274 | { |
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275 | if ( (element->value == emptyNoWeight.value && |
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276 | element->totalWeight == emptyNoWeight.totalWeight) || |
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277 | (element->value == fullNoWeight.value && |
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278 | element->totalWeight == fullNoWeight.totalWeight) ) { |
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279 | |
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280 | return OccGridRLE::CONSTANT_DATA; |
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281 | |
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282 | } else { |
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283 | |
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284 | return OccGridRLE::VARYING_DATA; |
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285 | |
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286 | } |
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287 | } |
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288 | |
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289 | #endif |
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290 | |
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